No issues if single. Great opportunities.
The issue if you ARE married is...
'happy wife, happy life'
...and in such the personal side of the interview will focus on whether your wife will be happy in HK.
Regarding bringing your wife to HK during round two- it is an opportunity to show that she supports your application and that you both understand the pro's & con's of living in HK first hand.
"The world is but a stage...."